SiPM PET/CT에서 3D 프린팅 기반 자체제작한 팬텀을 이용한 iMAR 알고리즘 유용성 평가에 관한 연구

• 영문명: The feasibility of algorithm for iterative metal artifact reduction (iMAR) using customized 3D printing phantom based on the SiPM PET/CT scanner
• 발행기관: 대한핵의학기술학회
• 저자명: 이민규(Min-Gyu Lee) 박찬록(Chanrok Park)
• 간행물 정보: 『핵의학기술』Vol.28 No.1, 35~40쪽, 전체 6쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2024.05.30

영문 초록

Purpose: To improve the image quality in positron emission tomography (PET), the attenuation correction technique based on the computed tomography (CT) data is important process. However, the artifact is caused by metal material during PET/CT scan, and the image quality is degraded. Therefore, the purpose of this study was to evaluate image quality according to with and without iterative metal artifact reduction (iMAR) algorithm using customized 3D printing phantom. Materials and Methods: The Hoffman and Derenzo phantoms were designed. To protect the gamma ray transmission and express the metal portion, lead substance was located to the surface. The SiPM based PET/CT was used for acquisition of PET images according to application with and without iMAR algorithm. The quantitative methods were used by signal to noise ratio (SNR), coefficient of variation (COV), and contrast to noise ratio (CNR). Results and Discussion: The results shows that the image quality applying iMAR algorithm was higher 1.15, 1.19, and 1.11 times than image quality without iMAR algorithm for SNR, COV, and CNR. Conclusion: In conclusion, the iMAR algorithm was useful for improvement of image quality by reducing the metal artifact lesion.

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키워드

Iterative metal artifact reduction (iMAR) algorithm Positron emission tomography Nuclear medicine Quantitative analysis 3D printing technique